Alloy



Patented Ma 15, 1 923.

, UNITED STATS PATENT. OFF-ICE. nEunY c. KIRK, or ROLAND PARK, Am GEORGE H. DUMLER, or sx iimomf I MARYLAND.

JALLOY. application filed March 5, 1921. Serial No. l 50,011.

To all whom,- it may concern: 40

Be it known that We-,.'HENRY C. KIRK and GEORGE H. DUMLER, citizens of the United States of America, the former residing at Roland Park, Baltimore County,

Maryland, and the latter in the city of Baltimore, State of Maryland, have ini'ented certain new and useful Improvements in Alloys, of which thefollowing is a specifica- 10 tion. I

The metal which is the subject of this invention in its preferred form is an alloy of copper containing approximately 10% iron. The applicants have made extensive invesindustries. As a result of their experiments the applicants have discovered that nickel in comparatively small quantities can be used as a vehicle causing copper to alloy with iron. It is found that'approximately.1% of nickel is" sufficient ,to introduce into and to 95 cause to alloy with copper at least 10% of iron producing an alloy of 10% iron, 1%

nickel, the balance being copper.

An alloy has however been made in proportions varying from 3 to 20% iron, nickel being used as a vehicle for the iron, preferably in the proportion of one .part nickel to 3 to 12 parts iron, the remainder of the alloy being copper.

The resulting alloy has a tensile strength of from 59,000 to 61,000 lbs; per sq. in. when rolled and annealed and an elastic limit of 14 to 16% in two inches. The metal is intended to be used as a substitute for brass to which it is superior, in strength, and in the fact that it can be hot rolled whereas brass cannot. Also it does'not require overhauling, i. e., it casts clean, has a high melting point a-nd produces goodsand castings for valves and the like. Also itghas greaternoncorrosivequalities than has brass or any similar alloy or mixture. The simplest method of making the is by dissolving iron in a molten mixture of. nickel and copper preferably near the meltrelated to the melting point of nickel, the

alloy out of common commercial materials 1 ing point of the mixture which is closely v nickel having a solvent efi'ect'on the iron which alone, hasa higher melting point than nickel. I We have thusdescribed specifically and m detail two 'alloys embodying our 1nven-' tion.

herein are used desoriptively' rather thanxin a limiting sense, the scope of the i being d-efined in the claims.

What we claim and desire to secure by Letters Patent is: p

1. A copper alloy substantially in the proportions of'10% iron, 1% nickel, the balance being copper. I

- 2. An alloy consisting in the-main of copper and containing from 3 to 20-% iron and a small quantity of nickel in theproportion of 1 part nickel to 4. to 12 parts iron.

Signed by us at B ltimore, Maryland, this 2nd day of March, 1921- l HENRY CHKIRK.

- .GEORGE H. DUMLER. Witnesses: PORTER H. FLAU'rr,

EDWIN F. SAMUELS.

In order that the nature of the same] may be clearly understood the specific terms 

